Combined typewriting and computing machine



Jan. 9, 1940. w. T. SAGNER COMBINED TYPEWRI'IING AID COMPUTING MACfIINE 7 Sheets-Sheet 1 Filed Jan.- '19, 1938 WALTER TJAGNER a Jan. 9, 1940. w. T. SAGNER COMBINED TYPEWRITING AND COMPUTING MACHINE '7 Sheets-Sheet 2 Filed Jan. 19, 1938 INVENTOR V MLTER TJAGNER ATTORNEY Jan. 9, 1940. w. T. SAGNER COMBINED TYPEWRITING AND COMPUTING MACHINE Filed-Jan. 19, 1938 7 eet 4 INVENTOR I444LTR 7. SAG'NER BY K ATTORNEY mm mmv m Jan. 9, 1940. w. T. SAGNER 2,186,347

7 COMBINED 'TYPEWRITING AND COMPUTING MACHINE Filed Jan. 19, 1938 '7 Sheets-Sheet 5 FIG. I0

INVENTOR WALTER 7T SAGNER ATTORNEY Jan. 9, 1940. w. r. SAGNER CQMBINED TYPEWRITING MID COMPUTING MACHINE Filed Jan. 19, 1958 7 Sheets-Sheet 6 FIG."

l WILTER T SAGNER ATTOR NEY Jan. 9, 194.0. wv T. SAGNER COMBINED TYPEWRITING Am) COMPUTING MACHINE "r Sheets-Sheet 1 Filed Jan. 19, 1938 INVENTOR .W4L7'ER TJAGNER W {Q I. Ylll.

Patented Jan. 9, 1940 UNITED STATES PATENT OFFICE Walter T. Samer, Wethersfleld, Conn., minor to Underwood Elliott Fisher Company, New York. N. 1., a corporation of Delaware Application January 19, ms, Serial No. 105,1:1

15 Claims. (01. 235-60) This invention relates to combined typewriting is a punctuation space position of the carriage and computing machines and is herein explained with reference to a,machine of the Underwood- Hanson class in which numeral type-keys and a step by step feeding carriage controlled thereby co-operate to index computing-wheel drivers successive denominations seriatim preparatory to actuating a general operator to cycle said drivers to enter the indexed amount in the computing wheels.

As exemplified in U. S. Patent No. 2,091,717 to H. L. Pitman, dated August 31, 1937, such machine may have a plurality of registers or sets of computing-wheels, and sets of indexable drivers therefor; and a single denominational series or set of trains actuatable seriatim by the carriage may ramify to the several sets of drivers, and, further, the sets of ramifications of said trains may be connected selectively, under" the control of the carriage, to the corresponding sets of drivers for the purpose of efiecting register selection at one or more computing-zones in the carriage-travel.

The invention deals with devices associated with typing and computing relative to denominations that include only decimal orders as in a dollarsand-cents amount, or denominations that include an odd order such as a fraction-expressing order in a quantity amount.

The numbers:

and

exemplify, respectively, the decimally expressed amount and the odd order or fraction-including amount. In such first number representing, say, dollars and cents, the typed tens-of-cents figure, 6, is usually separated, as shown, from the typed units-oi-dollars figure, 7, by a punctuation space which is produced as by operating the typewriter space-key between the typings of said figures. The machine may have provision whereby the typing carriage may be effective, through its position at the punctuation space, to lock the numeral type keys.

Comparing the above numbers as written for illustration, one below the other, it will be perceived that the of the lower or quantity expressing number may be typed when the typing carriage is at, what would correspond to, said punctuation space of the upper or dollars and cents number. The above numbers may also be typed each in a different column of the work sheet, the fraction, however, being typed at what relative to the aforesaid single set of trains actuatable by the carriage.

It is an object of the invention to provide for disabling or suppressing the numeral key-locking function of the carriage at the punctuation space when it is desired to type at such space a numeral or fraction, such as the above V2, by means of a type key or type action that is ordinarily locked at said space.

In decimal computing, as, for example, with respect to the first of the above numbers, it will be obvious that no computing wheel driver need be indexed at the punctuation-space position of the carriage. But, when typing" a fraction such as the above at the punctuation space, and when it is desired to compute the amount including such fraction, the fraction may be indexed in a driver for a fraction-computing wheel, and it is a further object of the invention to provide for this.

A further object of the invention is to provide for disabling or suppressing said key-locking function at will as by means of'a key operable preparatory to typing the fraction at the punctuation-space position of the carriage.

The fraction characters may be printed by means of upper-case types that may be associated with lower-case types used for printing the usual digit characters.

The machine may have provision whereby operation of the case-shift mechanism, for typing in upper case, may disable the carriage control of the computing-wheeldrivers so that when typing in upper case by means of the numeral type-actions, the latter will not be effective to index said drivers at a computing zone of the carriage. The carriage control of the drivers is effected by means of denomination jacks traversed by the carriage at the computing zone and forming part of the aforesaid trains ramifying to the several sets of computing-wheel drivers. There is also a jack engaged and actuated by the carriage at the aforesaid punctuation space to actuate the key-lock-,

' tim by a denomination-selector or tappet movable amount.

to arranging the denomination-jacks and a jackalong withthe carriage, and, in order to be engageable by this same tappet, the punctuationspace jack, which herein is used also as the fraction-denomination jack, may be disposed as usual between the appropriate two denomination-jacks.

A certain register may be adapted for accumulating fraction-including amounts, while ordinary decimal amounts may be accumulated in one or more other registers. The typing-carriage range of travel may include one or more computing-zones, and, for each computing zone there is provided a denomination-selector or jack-em gaging tappet. One or more register-selectors may also be provided on the carriage for each computing-zone.

It will be perceived in comparing the above decimal amount and the fraction-including amount as typed one below the other, that the carriage, after leaving the last denomination of the fraction-including amount, would still be within the computing-zone for the decimal A feature of the invention pertains engaging tappet provided on the carriage for the fractional-amount zone so that said latter tappet is ineffective to actuate any decimal-denomination jacks after leaving the punctuationspace or fractional-character-representing jack.

The carriage, in taking the letter-space step following the typing or indexing of the last digit for an ordinary decimal amount may actuate a cycling jack to cause automatically the general operator to be cycled. A further feature of the invention pertains to causing the general operator to be cycled automatically also at the instance of typing and indexing the fraction which is the last denomination-character of a fraction-expressing amount.

The normal all-keys-locking function is effective as the carriage reaches the fraction denomination in the typing and indexing of a quantity-fraction amount. Thus, there is blocked any attempt by the typist to write a fraction without first determining, as through operation of the case shift, that a fractioncharacter and not a digit character will be typed.

The machine usually has ten digit type keys, from 0 to 9. Considering, for example, the fractions as expressed in eighths, the digit key levers, say, from 1 to 7 may be used for typing the fractions A it in upper case.

Thus,- the remaining three digit type keys for 8, 9 and 0 are not used in fraction typing and indexing. Certain features of the invention pertain to novel provision for having only said 1 to '7 type keys unlocked preparatory to typing the fraction, and consonantly having said remaining keys locked to prevent inadvertent use thereof.

Other features and advantages will hereinafter appear.

In the drawings:

Figure-'1 is a perspective showing principally the carriage, case shift mechanism, and features of a plural-register mechanism arranged for typing and indexing all-decimal amounts and fraction-including amounts, some of the parts being shown broken away and sectioned for clarity.

Figure 2 is a sectional side view showing the quantity-fraction register.

Figure 3 is a sectional side view showing the typewriter and computing base and mechanism related to the invention.

Figure 4 isa side elevation showing details of the quantity-fraction register.

Figure 5 is a sectional side view of the machine showing the parts operated for typing and indexing a fraction.

Figure 6 is'a diagram of .a work sheet having decimal computing columns and a quantityfraction column.

Figure '7 is a'perspective of the selector unit, placeable on the carriage, relative to a fraction computing zone, parts of said unit being shown broken away to illustrate a cycle tripping tooth for said unit.

Figure 8 is a perspective of the selector unit for a decimal computing zone and shows said unit in relation to a cycle tripping train.

Figure 9 is a perspective diagram showing the quantity fraction-computing zone unit, on the carriage, operating the train to shift the fraction-computing register bar to indexable position and shows the concomitant operation of mechanism for looking all the numeral keys. This view also shows other mechanism for locking all but the fraction typing keys.

Figure I0 is a plan view diagram showing a part of the typewriter carriage, and indexing mechanism in the computing base for'indexing a fraction, the view representing a plurality of registers including all-decimal registers and a quantity-fraction register.

Figure 11 is a. diagram illustrating the type gars that carry the digit types and the fraction ypes.

Figure 12 is a plan view of the mechanism for looking all but the fraction printing keys of the row of digit keys.

Figure 13 is a perspective of the jack mechanism drawn on an enlarged scale to bring out details of parts of the key-lock releasing mech anism associated with said jack mechanism.

In a machine of the Underwood-Hanson class, a typewriter mechanism A surmounts a computing-base B, Figure 3.

24, 25, 26 and 2'! indicate, respectively, the keys, key-levers, bell-cranks and type-bars of the numeral or digit type-actions of the typing system. The alphabet type-actions are represented by the alphabet keys 23, and the spacekey action is represented by the space-key 29. The usual paper carriage 39 runs upon rails 3|, 32 in the typewriter frame 33 and supports a case-shiftable frame 34 in which a platen 35 is journaled. At operation of any type-action or of the space-key action, escapement dogs 36, feed-rack 31, escapement-wheel 38 and carriage spring motor 39 cooperate to letter-feed the carriage 30. A universal bar 22 has the usual connection represented diagrammatically at 23, Figure 3, to work said dogs 36 and is actuatable by any type bar 21.

The computing-base B may have one or more registers which may be of the kind shown in Patent 1,927,951 to H. L. Pitman, dated September 26, 1933, in that for driving the register computing wheels 40 oppositely for addition and direct subtraction there is provided for each register or set of said wheels 40, a set of register bars 4 I, and idlers 42, permanently in mesh with racks 43 on said register-bars. Each set of computing wheels 40 normally stands disengaged from its,

grease? ,L said wheels with said racks 43.

The register bars 4| of a set are slightly advanceable seriatim to align each of their series of digit pins 45, 45 with pin-setting bars 46' which extend across all the register bars and form part of the usual Underwood-Hanson-pinsetting linkages 41 representing different digits. Each numeral key-lever 25 has a pendent rod 48 to engage an arm 49 or. a rock-shaft 69 to rock the latter and thereby actuate the corresponding linkage 41, to set downwardly, in whichever register-bar is slightly advanced, the digit-pin 46 corresponding to said numeral key-lever 25. Each linkage 41 has its individual rock -shaft 50 connected at 51 to an upper and endwise movable cross-link 58 of the linkage 41, said upper link 68 and the pin-setting bar 46 being connected by bell-cranks 59. The usual spring device 6| returns each register bar following its slight advance and the setting of a digit pin therein.

A denominational tabulating mechanism for the carriage is diagrammatically represented by denominational tabulating-keys 52 and denominational tabulating-stops 53, Figure 3. Said denominational keys 52, stops 53 and the co-'operat-' ing connections and carriage-release means (not shown) may be of the kind shown in Patent 1,858,447, to W. F. Helmond, dated May 17, 1932.

The usual reciprocatory general operator crossbar 54, of a cycling-mechanism is common to all of the register-bars 4|, and, by means of fingers 56, Fig. 3, pivoted thereon, may engage the set digit-pins 45 to advance the register-bars to rotate the wheels 49 at the advance stroke of said cross-bar 54, saldwheels 49 having been shifted first, as will be explained later, to engage either the racks 43 or the idlers 42. At the return stroke of the cycling cross-bar 54, the latter engages shoulders 55 of the advanced register-bars 4| to return the latter, the computing wheels 40 having been disengaged first from the racks 43 or idlers 42. The spring devices 5| become effective to retract the returned register-bars sufiiciently from the returned cross-bar 54 to permit the aforesaid slight advance of the register-bars for the pin-setting operation. I

Amounts typed in diiferent columns across a work-sheet as represented in Figure 6' may be accumulated in selected registers.

For each computing zone corresponding to a work-sheet column, the carriage has a selector unit Si (or HF) having a body 62 locatable as at 63 along a carriage supported rack 64, Figure 1. Said body 62 may have a columnstop 65 for engaging any one of the denominational key-operated ,tabulating stops 53. The body 62 includes a tappet 66"(or 66F) and one or more registerselecting teeth 61 differentially placeable in body slots 68. The body 62 may be laterally supported at its top and rear, Figure 3, by a rear rack 69 on the carriage and its rear end may engage a horizontal guide rail 10, as at H, Figure 3. Said guide rail 19 is adapted to brace said unit 6| (or 6 IF) vertically while the latter passes through a computing zone.

The tappet 66 (or 66F) traverses a single series of jacks 13, 14, 15, Figures 1, 3, 13, shown in the form of vertical fiat rods depressible seriatim by said tappet and therefore slidably retained at their upper ends as at 16, and at their lower ends as at 11, in a housing 18 attached to the typewriter frame 38 to which is also attached a housing 19 adapted to guide vertically the tabula stops 53.

'The machine is shown provided with three registers and therefore with three sets of registerbars, as indicated in Figures 1 and 10. The second and third registers from the left may be all-decimal registers, each having, say, six computing wheels 49 and six register-bars 4|, and their idlers 42 for accumulating up to 9 999 99. The other register, seen at the left, is adapted for accumulating fractions in a right-hand or lastdenomination wheel 8| and has, besides said wheel 8|, say, four decimal order wheels 49, for accumulating up to 9 999%, thelfractions being illustratively expressed in eighths.

The largest number of register-bars-in any decimal register thus being six, there are six of the jacks 18 hereinafter called denomination jacks. Interspaced with said denomination jacks 13, according to punctuation spaces which, it will be perceived, may point of! the typed number such as 9 999 99, there are shown two punctuation space jacks 14 and 16.

The denomination jacks 13 form parts of trains extending down into the computing-base B and therein ramifying to the different sets of registerbars 4|. The ramifying arrangement may be substantially as in Patent No. 2,090,852 to H. L. Pitman, dated August 24, 1937.

Said arrangement, briefly described-is as follows, Figures 1, 3, 5, 9, 10: The lower end of each denomination jack 13 abuts, as at 88, a vertical thrust-rod 84 slidable at its upper end-portion in a guide 85 in the computing base B, and pivotally connected at 86 to a companion bell-crank 81. The several bell-cranks 81 have a common fulcrum-rod 88 in the computing base and have downwardly extending arms abutting, as at 89, the rear ends of forwardly extending horizontal master racks 99. Transverse blades 9| are mounted, as at 92, to rock about their lower edges, the upper edge of each transverse blade being adapted to mesh, as at 93, Figure l, with the companion master rack 99. Each blade 9|, it will be perceived, is of the same denomination as the Jack 13 to which it is connected by means of the master rack 90, the bell-crank 81 and the thrust-rod 84. The transverse blades 9| mesh with sets, one set for each register, of distributive or shift racks 95. The distributive racks for the middle register are shown, Figure 1, partly interspaced with the master racks 99. Each distributive rack 95 has pivoted to its forward end a coupler 96, the set of couplers for each set of distributive racks being normally in depressed position as in Figure 3, and the sets of distributive racks which form the sets of ramifications of the denomination trains being thus normally disconnected from their companion sets of registerbars 4|. For selecting a register, the set of coupiers 96 associated therewith is swingable upwardly, under control of the carriage, to bring the forward ends of the couplers into abutment with the register-bars 4| as indicated at 91, Figures 1 and 5.

Carriage-controlled register-selecting trains may herein be of the type disclosed in the application of H. L. Pitman, Serial No. 72,348, filed April 2, 1936; Briefly described, such registerselecting trains are as follows: For the three registers shown, three vertically slidable camplates 98, 99, I99 work in guides |9|, I92 in'the housing 18. Figure 3 shows completely the train for one of the registers, from which it will be perceived that the lower end of each cam-plate 95-430 abuts a companion plate I03, the several plates I03 being individually slidable vertically in guides I34, I55 in the housing". Each' 5 plate I53 abuts, as at I55, an upright thrust-rod IIII slidable at its upper end in a guide I03 in the computing base, the lower end of each thrustrod IIiI being pivotally connected to a lever I09. The several levers I59 may be on a fulcrum-rod III! in the computing base and each lever may be connected by a linkage ,II I to a coupler-set controlling rock-shaft II2 Journaled in a crossmember II3 of the computing-base framework. It may be noted that said cross-bar I I3 also supports a frame H4 in which the master racks 95, blades 9|, and. distributive racks 95 are mounted. Each rock-shaft II2 has a crank wrist II5 for engaging, as at I", a plate II3 adapted to move a companion set of' the couplers 99 upwardly from the normai,-idle position, Figure 3, to the effective Figure 5 position, said plate II3 being slidably retained, as at II9, for vertical movement on a stationary plate I29, of the computingbase framework, adapted also to supportslidably 95' the rear end of the register-bars 4I, as at I2I,

Figure 3.

For selectively engaging one or more of the register-selecting cam-plates 98-400, each selector unit on the typing carriage may have one or more of the register-selecting teeth 51. Figure 5 shows aselector unit SIF havlnga tooth 51 selecting and depressing the fraction-register cam-plate 98, wherefore the rest of that registerseiecting train extending, as just described,'to the coupler-set controlling plate I I8 is shown operated to raise the set of couplers 99 for the fractional register into operative position to abut the set of register bars for the fractional register as at 91, Figure 1. It will be obvious that the trains from the other register-selecting camplates 99, I may be substantially similar to the one just described, it being understood that each rock shaft H2 and its wrist 6 may be suitably disposed relative to its coupler controlling piate H8 and that the linkage III may be adapted to connect the rock-shafts II2 to the companion levers I09 which may be grouped as in Figures 1 and 3.

It will be remembered that the jacks I4 and I are punctuation-space jacks interspaced with the denomination jacks 13. The first denomination jack 13 from the right of Figure 13 is for a units of thousands denomination relative to a number such as 9 999 99 and has in order of succession thereto the punctuation jack I4. Said jack ,i4 does not operate to select a register-bar, its function being solely to co-operate to lock the digit type-actions through being depressed by the carriage tappet 66 when the carriage is at the first punctuation-space position from the left, as noted in said typed number 9 999 99. For this purpose said jack has a pin-and-slot connection I24, Figure 13, to a universal bail I25 pivoted as at I26 to the housing 18. A spring I21 yieldably upholds said bail I25 and the thereto connectedjack I4 in normal position in which a shoulder on the jack I4 abuts the undersideof the guide 16 as in Figure 3. The universal bail I25 is connected by a pin-and-slot connection I28 to a jack I29 which is a dummy in that it is shortened so that its upper end is not engageable byany of the tappets such as 66. At its lower end, Figure 9, said dummy jack I29 abuts a thrust-rod I3I guided like the thrust-rods 84 and connected 15 to a bell-crank I32 mounted on the fulcrum-rod 55. Said bell-crank I32 abuts the lower arm. of a lever I34 keyed to a rock-shaft I35 in the computing-base. Said lever I34 is connected by a link I33 to a rock-shaft I3'Ijournaled in a frame I33 for the pin-setting linkages 41. Pendently 5 pivoted individually to the front of said frame I35 there are tumblers I39 arranged in a. row confined at its ends so that the row may be closed up by an interponent I49 on said rock-shaft I31 when the latter is rocked clockwise of Figure 3 19' by means of the punctuation-jack train just described. When' the row or series of tumblers I39 is thus closed up there is no room for admission therebetween of any'of the rods I seen depending from the numeral key-levers 25, and, thus,

depression of said key-levers is prevented to presaid key-levers and interposing of the inter- 25 ponent I43. The arrangement of the tumblers- I39, the interponent I49 and pendent rods I may be, as to further details, substantially as disclosed in Patent 1,237,895 to W. L. Gumprecht, dated August 21, 1917.

The punctuation-space jack [5, considering the dollars-and-cents amount,9 999 99, is between the two jacks I3 for tens of cents and units of dollars, and if the machine were 'adapted to compute solely in decimal orders, said jack I5 would be connected directly to the universal bail I25, like the jack 14, for operating the dummy jack I29 to lock the keys.

However, it is desired to type and compute .a

fraction such as in the illustrative, quantity- 40 fraction number 9 367%, when the carriage has depressed said jack 15; the fraction being typed and computed when the carriage is at, what is ordinarily, the punctuation space ,gorresponding with said jack I5. Novel mechanism is therefore computing-wheel driver or register-bar I45 associated with the fractions wheel 8| oi the quantity-fraction register.

For selecting, that is, slightly advancing, said fraction register-bar I45, the jack I5 operates, Figures 1, 9, l0, l2, through a thrust-rod I45, a 90 bell-crank I41 fuicrumed on the rod 88, a master rack I48, a blade I49 and a distributive rack I50 having a coupler 95. Said latter coupler, 96, is controlled by the plate II8 along with the other couplers 96 associated with the distributive racks 95 that control the other register-bars, 4 I, for the quantity-fraction register, it being noted that the set of register bars for the fraction register includes said fraction register-bar I45. The train from thejack 15 to and including the blade I49 is individual to the fraction register since said blade has only the distributive rack I59 for the fraction register-bar I45 connected thereto, the reason for this being that a decimal register has no fraction-computing order or denomination. 15

The fraction registerordinariiy is not used at a computing zone together with a decimal register. Thus, while using the decimal-register mechanism, the-couplers 98 for the fraction register will be in their normal depressed or idle positions and the jack 15 when depressed by the carriage at the corresponding punctuation space relative to ordinary decimal computing will cause an idle advance of the distributive rack I58.

For releasably locking the digit type keys by means of the jack 15 and the dummy jack I28, the arrangement is as follows. The jack 15 has projecting laterally therefrom' a stud I53. A connector-bar I54 has a forked rear end I55 formed by a slot I 55 to slidably fit over said stud I53 as indicated in Figure 13. Thus, the lower branch I51 of said forked rear end serves as a retractible connection between said stud I53 and a secondary jack I58 that, for vertical movement, may be slidably mounted on the Jack 15 as by means of two vertically spaced pin-andslot connections I59. has a shoulder I58 engaging a pin I6I of the universal bail I25. Said secondary jack I58 may be disposed in the spacebetween the jack 15 and the next jack 13 and the forked rear end I55 of the connector-bar I54 may also be disposed in the space between said jacks 15, 13, the lower end portion of said secondary jack I58 therefore having a crook I53 to pass behind said connector-bar rear end I55 and then forwardly under the latter for engaging therewith edgewise as at I84, Figures 3 and 9. The front end of the connector-bar is pivoted at I55.

It will be perceived now that when the jack 15 is depressed its stud I53 may depress the rear end I55 of the connector-bar I54 to depress the secondary jack I58 to rock the universal bail I25 to depress the dummy jack I29. The depressed dummy jack I29 locks the digit type key levers 25 in the manner hereinbefore described.

When the carriage is at the punctuation space corresponding with the jack 15 and the fraction register is being used, the connector-bar I54 is movable forwardly on the jack stud I53 to release, While the jack ,15 remains depressed, the

depressed secondary jack I58 along with the depressed bail I25, the depressed dummy jack I29 and the key-locking interponent I48, connected to said jack I29. as described, the spring I21, for the bail I25, and another spring I52, Figure 3, for the rock-shaft I31 co-operating to restore the thus released parts and thereby causing the digit key levers 25 to become unlocked. This permits, Figure 5, typing of the fractions while the jack 15 remains depressed in order to slightly advance the fraction register-bar setting position under the pin-setting bars 45.

The fractions are typed by upper case types;

Thus, considering the fractions as being expressed in eights, the type bar 25 that has the lower case type "1. also has an upper case type for typing and the type bar having the lower case type 2" has the upper case type "A, and so on up to the type bar for the lower case type '1 which has an upper case type 7 It will be perceived now that the digit keys for l to '1 are also used for typing the fractions Va, A "A; as indicated in Figure 11 and by the key characters I55, Figure 10.

Preparatory to typing a fraction, the platen Said secondary jack I 58 I45 to fraction pinframe I12. Said side-member "I and aright side member I13 are rigidly connected by a rear cross shaft I14 and a front shift rail I15 along which runs, during travel of the carriage 38, a roller I15 on the case-shiftable platen-frame 34.

The shift rail frame I12 is pivoted as usual to the typewriter frame 33 as at I11, Figure 1, so as to be rockable, by depression of said case shift key lever I58, for raising its shift rail I15 to shift the platen frame a and its platen is to 10 upper case position determined by a case shift stop (not shown) on the carriage 38 engaged by shoulders I18 at the sides of the shift frame.

'In the lower case position of the platen 35, its

shift frame 34 stops against the carriage 38 as at I18, Figure 1.

The shift rail frame cross shaft I14 has fixed thereto a depending arm I88 to which is pivoted, as above mentioned at I55, the connector-bar I54 'which normally operatively connects the jack 15 and the secondary jack I58. Thus, when said shift rail frame I12 is rocked by depressing the left shift key I51 preparatory to typing a fraction when the carriage is at the position at which it has depressed the jack 15, and has also depressed, through the medium of the connector-bar I54, the secondary jack I58, the connector-bar I54 is withdrawn. This releases the secondary jack I58 for its resulting return to normal position and thereby causes the digittype-key levers 25 to become unlocked; the jack 15, however, remaining depressed to select the fraction register bar I45 for indexing one of its pins 45 by means of one of the thus unlocked digit-type-key levers 25. The usual side arms I8I fixed on a rock shaft I82, Figure 3, journaled in the carriage 38, and lower side links I83, support and guide the platen frame 34 in its case shift movements.

All of the type bars 21 of the type system may have upper and lower case types. In order to type, without computing, in a computing zone, as by means of the digit type keys 25 and the corresponding upper case types, the carriage control of the jacks such as 13-15 and the camplates such as 98 may be silenced. For such noncomputing upper case typing, a right hand shift key I81 and its key lever I88, fulcrumed at I89, Figure 1', are depressed to rock the shift-rail frame I12 to raise the shiftable frame 34 and platen 35 to upper case position. In order that depression of said right hand shift key lever I81, only, avails to disable the carriage relatively to said jacks and cam-plates, the construction may be as follows, Figures 1, 3, 5: The cross shaft I14 of the shift rail frame I 12 is reduced as at I98 to receive a rotatably loose sleeve I9I to which is fixed an arm I92 having a lateral extension I93, for engaging the right side member I13 of the shift rail frame I12, and engaged by an arm I 94 of the right shift key lever I88.

Rigidly connected to said sleeve I9I by a clamp I96 is a rearwardly extending arm I91 from which depends a link I98 to jack and cam-plate disabling mechanism, in the computing base, which may be substantially of the kind described in said Pitman application No. 72,348.

In said disabling mechanism an arm I99, Figures 3 and 5, connected to the lower end of said link I93, is loosely fulcrumed on the rock shaft I35 and is depressed by said link I88 at depression of the right hand shift key lever I88 whereby a roller 288 on said arm I99 displaces a cam arm 28I fixed to a shaft 282 journaled in the computing base- Said shaft 282 is thus rocked clockwise of Figure 2 to withdraw a latch arm 283 fixed thereto from a step 284 of a latch plate 285 fixed to a rock shaft 288 journaled in the computing base. Said latter rock shaft, 286,

I shaft 88 is caused-to be displaced rearwardly and the fulcrum shaft III to be displaced downwardly thereby permitting the jacks I8, I4, .15 etc. and the cam plates 88, 88, I88 to drop or be depressed idly without actuating the master racks 88 of the register bar selecting trains, and

without actuating the plates H8, controlling the sets of couplers 88, of the register selecting trains. It will be perceived then that depression of the right shift key lever I88 operates through its arm I84 to turn the sleeve I 8I by means of the lateral extension I83 to disable the carriage control of the jack and cam plate trains and by means of said lateral extension I83 to rock also the shift rail frame I12 to upper case position.

The right hand shift key lever I88 is kept down, of course, during the non-computing typing of the upper case charatcer or characters. Upon releasing said right hand shift key lever I88, the shift rail frame I12 is restored to normal 1 lower case position along with the frame 84 and its platen and, concomitantly, the sleeve I8I is rocked backto its normal position thereby lifting the link I88 and the arm I88 connected thereto.

At the lift of said arm I88, a laterally exl tending tab 2" thereon engages a pawl 2I8 pivoted to an arm 2 fastened to a trip shaft 2I5,

journaled in the computing base, thereby rocking said shaft 2I5 counter-clockwise of Figure 3 to actuate a single cycle clutch mechanism (not shown), as described in said application No. 72,348'to connect a general operator shaft 2I8,

' journaled in the computing base, with a motor (not shown) for a resulting single revolution clockwise of Figure 3. During said revolution of said shaft 2I8, a cam roll 2I8 mounted thereon engages a flange 2I8 of the latch plate 285 to rock the latter and its shaft 288 counter-clockwise to the normal Figure 3 position, the latch arm 283 being concomitantly spring pressed to reengage under the step 284 of said latch plate 285. This restores the fulcrum rods 88 and III] to their normal positions, Figure 3, .to render the jack and cam plate trains controllable by the carriage again. A cam 228 on the general operator shaft 2"; may engage a roller 22! on the latch arm 283 during the cycle to insure return of said latch arm 283 to normal position under said latch plate step 284.

The reciprocatory register-bar-actuating cross bar 54 has a crank and pitman connection (not shown herein, but described in said application No. 72,348) to said general operator shaft 2I8 so as to be'cycled by the latter. In said general operator shaft revolution, for restoring the disamass? lever I88, independently of thesleeve I8I and its connections to the jack and cam-plate disabling mechanism. A spring 222 connected between-the lateral extension I88 and the right shift key-lever arm I84, Figure 1, keeps said sleeve I8I, and hence the arm I88 that controls the disablement of the jacks and cam-plates, in I normal position when the shift rail frame I12 is operated by means ofthe left shift key-lever I88 for typing and indexing fractions. When said arm I88 is depressed at depression of the right shift key-lever I88 the pawl 2I3 yields, counter-clookwire of Figure 3, in order to avoid actuating the clutch trip shaft 2I5, the latter being thus actuated only by the upstroke of said arm I88 as said right shift key-lever is released.

The computing wheels of each register are mounted coaxially on a suitable shaft I85 in the aforesaid frame 44. In the fraction register, namely the first register from the left, Figure 10,

the last denomination or fraction computing wheel 8| is of smaller diameter than the other wheels 48. The fraction register is shown illustratively with five computing wheels, including said last wheel 8|, for computing amounts up to 9 999 The ratio of the diameter of the fraction wheel 8| to the diameter of a decimal wheel 48 is such that the fraction wheel 8| has eight steps of movement (for eighths) between its recurrent zero positions, and the decimal wheel has ten steps of movement between recurrent zero positions. Thus, the fraction wheel 8| may be an eight tooth wheel as in Figure 2 and the decimal wheel 48 may be a ten tooth wheel as in Figure 3. The register bar I for the fraction wheel therefore has a rack 228 at a higher level than the decimal register-bar racks 43. Said register bar I45 has eight index pins 45, 45. Further, there is provided a fraction idler 224 that is of smaller diameter than the decimal idlers 42 and its axis of rotation is offset to the left, Figures 4 and 9, of the axis of'said idlers 421 The fraction idler 224 therefore turns on a stud 2 I 'I in the side of one of two plates 248 flanking the frame 44 for the fraction register, Fig ures 4, 5 and 10, while the other idlers 42, in the fraction register, turn on a separate shaft 225 supported by means of the plates 248 flanking the fraction register frame 44. Thus, when the frame 44 for the fraction register is moved rearwardly preparatory to rotating the wheels 48, 8! in subtraction direction, the fraction wheel 8! reaches and meshes with its subtraction idler 224 when the other wheels 48 reach and mesh with their subtraction idlers 42. Frame 44 is slotted as at 228 to move horizontally in guides,

For the fraction register said guides are designated at 22], 238, Figures 2, 4, 18. Each frame 44 has a transverse rod 228 slidable in a horizon'tal'slot 228 of an arm 238, Figure 2. Preparatory to additive rotation of a set of the wheels 48, or 48, 8I, the frame 44 is rockable downwardly about the guides such as 221, 238 to mesh' said wheels with such as 43, 223.

For each register and its frame 44, there are the right and left flanking plates 248, attached to the computing base framework to retain said frame 44 sidewise. A bracket I85 fastened to the the register bar racks left face of the right flanking plate 248 for the fraction register has an offset I88 to the left of the fraction idler 224 to support the right end of the idler shaft 225 as will be apparent in Figure 10, the fraction idler 224 thus being disposed, on its stud 2", between said offset I88 and the right flanking, plate 240. The left end of the idler shaft 225 may be directly attached tothe left flanking plate 240 and may have a collar forming the guide 221 for the left hand slot 220 of the fraction register frame 44. The left face of the right hand flanking plate 240 for the frattion register presents a plate or boss forming the, guide 238 for the right hand slot 228 of the computing wheel frame 44, said boss being adapted as at 2 to clear a hub of the fraction idler 224. Each flanking plate 240 for the decimal register receives an end of an arbor I84 for the decimal register idlers 42 and said arbor may have two of the end collars or guides 221 for the frame 44.

Suitable means for selectively moving any one of the computing wheel frames 44 rearwardly to mesh and unmesh the computing wheels with the idlers, or downwardly to mesh and unmesh the computing wheels with the register bar racks may be as set forth in said Pitman Patent 2,091,717. Briefly described, said means include a rock shaft 23I journaled in the computingbase and having rotatably loose thereon, for each computing wheel frame 44, one of the arms 230. For each of said frames 44, there is also rotatably loose on said rock shaft 231 a pair of side arms 232, Figure 2, rigidly connected by a cross bar 233 and having links 234 to the computing wheel frame 44. For each frame 44 there is a coupling bail 235 splined to said rock shaft 23I so as to be slidable laterally to couple said shaft 23I either with the arm 230 for said frame or with the cross bar 233 and its side arms 232. When the arm 230 is thus coupled to said rock shaft 23I, the rocking of the latter clockwise of Figure 2 will swing the frame 44 downwardly to mesh the computing pinions with the register-bar racks. When the cross bar 233 and its side arms 232 are coupled to said rock shaft the latter when rocked clockwise shifts the frame 44 rearwardiy to mesh the wheels with the idlers.

engages any of the advanced register bars toreturn them.

Said Pitman Patent 2,091,717 also discloses suitable state control mechanism that includes, for each register, a state controller 231, partly shown, Figure 2, shiftable from a normally neutral position to a forward additive position determined by depressing the register selecting cam plate 88 or 88 or I00. Said state controller 231 is also shiftable to a farther forward, subtractive position determined by depressing a subtraction ter.

2, Figure 1, that is shorter than a dwell 242 for the cam plate, 88 or I00, for an all-decimal regis- Thisis because the jack 15, controlling the last denomination or fraction register bar I45, is the last jack operated in the fraction computing zone, whereas in an'all-decimal computing zone a register bar controlling jack 13 engaged by the carriage at a second further step to the left of said jack 15 is the last jack operated and, further, because it is desired to have the register selecting tooth 81 release its companion cam plate 88, 88 or I00 when the carriage tappet 88F or 58 releases such last jack 15 or 13. 4

The selector unit, 8i for an all-decimal computing zone has the Jack engaging t'appet 88 offset rearwardly relatively to a jack engaging tappet 80F provided on the selector unit BIF for a fraction computing zone. Further, the last two denomination jacks "corresponding to the last two figures of a number such as 9 999 99 have the forward portions of their upper ends cut away as at 243, Figure 13. Thus, it will be perceived that tappet 88F of the fraction computing zone selector unit 8IF cannot engage said last two denomination jacks 13 and is, therefore, out of the fraction computing zone as soon as it leaves the jack 15. It is therefore feasible to minimize the spacing between two succeeding selector units along the carriage so that when a tappet 68F of the unit SIF has just left the jack 15, a tappet 65 or 66F of a succeeding selector unit may immediately depress the highest denomination or first jack 13 from the right of Figure 13. This feature permits the width of the work sheet fraction-including-column to be commensurate with the distance from the jack 15 t0 the first denomination jacik 13 at the right and therefore not excessively W1 e.

The subtraction cam plate 238 is depressible by a subtraction tooth 818 similar, as to its cam-plate-dwell-engaging portion, to the register selecting tooth 61. Said cam plate 238 therefore has a short dwell 244 like the fraction register selecting cam plate 88 in order to be released concurrently with the tappet 66F of the'selec-tor unit BIF leaving the last fraction-computingzone jack, 15. Said subtraction cam plate 238 is also depressible for determining subtraction in an all-decimal computing zone. Therefore, the all-decimal zone selector unit 6| may have, for subtraction, a tooth 245 broadened sufficiently as to its cam-plate-dwell-engaging portion, as

will be apparent in Figure 1, to keep the shortdwell subtraction cam plate 238 depressed until the jack engaging tappet 66 of said unit 8| leaves the last denomination jack 13 relative to the alldecimal computing zone.

At the final carriage step, from a. computing zone, by which the jack tappet 86 or F leaves the last jack, 13 or 15', a cycling trip lever 241 pivoted at 248 to the cam plate housing 18 is rocked to depress a cycling jack 248. the latter being articulated to said lever 241 at 250, Figure 8, and being mounted in the housing 18 foryortical movement like the other jacks 13, etc, buts.

being shorter at its top end so as not to be encam plate 238, Figures 3, and grouped withvgageable P Said'mppets' I The cycle tripping train from said trip lever the cam plates 88, 88, I00 in the housing". Said state controller 231 cooperates with a transverse slide 238, Figure 2, to determine for its register the neutral, additive, and subtractive positions of the coupling bail 235 relative to the rock shaft 231 and the computing wheel frame 44.

The cam plate 88 that controls the set of coupiers 86 for the fraction register has a dwell in me am 25I'engages an arm 250', Figure 5, of the clutch trip shaft 2I5 in the computing base. Thus, rocking of the cycle trip lever 241 results king said trip shaft 2I5 for an ensuing cycle-of the general operator mechanism. The

. selector unit 6|, for an all-decimal computing engage the trip lever nose 259 and rock the trip lever241 to effect automatically an operation of the cycling mechanism as the carriage takes the final step whereinsaid tappet 85F leaves the last jack, 15, for said quantity-fraction zone.

With the carriage at the position in which the Jack 15 is depressed, the left shift key I81 (Fraction key) may be depressed, it will be remembered, to shift the platen to' upper case position preparatory to typing and indexing the upper case fractions. It will be further remembered that the depression of said left shift key i 81 concomitantly causes withdrawal of the connector bar I54 to release the secondary jack I58 that, otherwise, remains depressed along with said Jack 15 to look all the digit key levers 25. All

the ten digit key levers 25, from to 9", thus become unlocked in that the all-digit-keys-locking interponent I40, is withdrawn at the release of the secondary jack I58. It is desired, how- .ever, to have the 8, 9 and 0 digit key levers locked again in order to prevent inadvertent use thereof when the carriage-is at thefraction typing denomination. An auxiliary key locking mechanism devised for this purpose and 'controllable by said same jack so as to be effective only on. said-8, "9. and 0 digit key levers at the fraction typing and indexing position of the carriage will now be described, see Figures 9, 10

- and 12.

The distributive rack I50 for the fraction denomination is slightly advanced, it will be remembend, to pin-settable position by depressing the jack 15. Said rack I50 has an upright arm 284 having a pin-and-slot connection 255 to an arm 265 fixed to a transverse rock shaft 258 Journaled in brackets 259shown mounted on bars 210 of the frame II4. Another arm 212 fixed to said rock shaft 258 is pivoted to a forwardly extending link 213 slidably supported at its forward end as at 214 by the pin-setting-linkage frame I38,

Figure 9. Said link 213 may be articulated as at 215 to a. bell-crank 218 pivoted at 211 to a bracket 218 on said frame I38. Said bell crank 216 has a pin and slot connection 21! to a key locking bar 28I slidably retained, for endwise movement, on said frame I38 as at 282, 283, and is shown with three clearance notches-284 that in a normal position of said key locking bar 28I permit downward passage of spurs 285 provided only on the key lever rods ill for the key levers for 8, 9 and 0.

It will be perceived now that at depression, by the carriageof the jack 15, the latter operates through the described train, from the distributive rack I50, to shift said key locking bar 28I endwise to the left sufficiently so that key locking portions 219 thereof, to the right of said clearance notches 204 come under the spurs 285, as in Figure 9, and thus prevent depression of the key levers for 8,.9 and "0". The locking bar 28I may slidably rest on supports 280, on the frame I30, underlying thekey-locking portions 284. Thus,

when the left shift key I01 is depressed, causing the secondary jack I58 to be released so that all the digit key levers become unlocked as far as the all-key-lever locking interponent I40 is concerned, it will, nevertheless, be only the seven key levers for the seven upper case fractions W to that will be operative since the jack 15 remains depressed, causing the key locking bar 28l' to lock the other three key-levers, for 8, 9 o.

Operation 1 Considering, for example, the work sheet, Fig.

ure 6, the carriage may betabulated leftward, as

I from the usual margin stop (not shown), to the highest denomination position for the Amount to be typed in the first column. The appropriate denomination tabulating key 52 is therefore used and its companion denomination stop 53 cooperates with the column stop 55 of the selector unit Iii provided on the carriage for the Amount column. The amount such as 3 426 '76 is then typed and the corresponding pins 45 are concomitantly set in the appropriate all-decimal register bar set selected by means of the tooth 81 placed on said unit GI to depress the appropriate register selecting cam plate, such as I00 for the right-hand register. During the typing of the amount the tappet 88 of said unit 8| traverses all of the jacks I3, 14, 15 to advance the register bars H of the selected set seriatim to pin settable positions, and it results that the appropriate pins 45 are set to set up the amount in said register bar set.

At the punctuation-space carriage position corresponding to the jack 14, the latter is depressed to cause all the digit key levers 25 to be locked to compel the space key 29 to be operated for the first punctuation-space for said amount. Similarly, at the punctuation-space carriage position corresponding to the jack 15, the latter willbe depressed and, concomitantly, the secondary jack I58 will be depressed to cause all the digit key levers 25 to be locked to compel operation of the space key 29, it being noted'that at said seccycling mechanism to cycle the indexed register bars H to accumulate the index Amoun in the selected right hand register.

The carriage is now tabulated for the second or. Quantity column of said work sheet. The arrangement issuch that the order in which the tabulating keys are used is the same'for the fraction including amount, as for the all-decimal amount. Thus, the fthousands tabulating key 52 is used for tabulating the carriage to the thousands? position for either an all-decimal column or a quantity fraction column. Similarly, the "hundreds tabulating key 52 is used for tabulating the carriage to the hundreds position for either kind of column, and so on. If desired the denomination tabulating mechanism may include a tabulating key 52 and stop 53 for the punctuation space corresponding to the jack 15 as for tabulating the carriage directly to the the all-key-levers'locking interponent M0.

position to type an amount consisting only of a fraction such as The carriage having been tabulated to the appropriate denomination for typing in the second or Quantity column, the quantity such as 1 468%, Figure 6, may be typed. For indexing the quantity in the register bars 4I, I45 for the quantity-fraction register, namely, the first register from the left of Figures 1 and 10, the carriage is provided with a selector unit SIF having the jack engaging tappet 86F and the tooth 61 for depressing the fraction register selecting cam plate 58. At the first punctuation space position of the carriage relative to said quantity 1 463%, the tappet depresses the jack 'l-l causing all the digit lrey levers to be locked to compel op eration of the space key ill. At the typing of the decimal digits 1 468, of said quantity, the tappet 65F operates the corresponding jacks l3 seriathn to advance the corresponding register bars ll consonantly with indexing said decimal digits therein. Upon typing the last decimal digit, 3, the carriage takes its letter feed step to and ric presses the jack and, along with the depression of said jack the secondary jack tilt is depressed by means of the connector bar its to lock all of the digit hey levers This locking oi all the key levers at the carriage position corresponding to the jack l5 apprises or signals the typist, should she attempt to type the fraction Without case shifting, that she must first shift the platen to upper case by do pressing the left case shift key It? whereupon the connector bar ltd will have been withdrawn to release the secondary jack H58 to withdraw The jack it, however, remains depressed by the tappet 66F to slightly advance the fraction register bar 3 35 to pin-settable position, and through the depressed jack the auxiliary key locking'bar 228i is in its leftward shifted position, Figure 9, to lock the last three key levers 25, namely, the key levers for 8, 9, The appropriate one of the seven key levers 135 is operated to type, say, the at of said quantity and the seventh pin 45 in the register bar 1145 is thereby caused to be set. It may be noted here that said register bar I45 need have only eight index pins, namely, seven of the pins t5 and a zero pin 45.

At the letter feed carriage step following typing and indexing the '75, the trip tooth 262 of the unit BlF actuates the trip lever 241 to cycle the general operator mechanism to actuate the reg= ister bars ll M5 of the quantity fraction register to accumulate the indexed quantity-fraction in the computing wheels fill, SI of that register. The left hand shift key 561 may be released, of course, upon typing the fraction 7 and the resulting restoration or" the shift rail frame I12 restores the connector-bar I54 to re-connect operatively the jack l5 and secondary jack I58. To facilitate the re-connection the connector bar may have a camming-bevel 286, Figure 5.

As the tappet 68F leaves the jack I5 the latter becomes restored as by means of a spring such as 287 connected to the master rack I48. The other master racks 90 may have similar springs for restoring their companion jacks; and the cycle tripping train, from the trip lever 241, and the register selecting trains from the cam plates 98I00, may also have suitable restoring springs (not shown).

Following the Quantity entry, the carriage may be tabulated for typing in the third or Deduction column of said work sheet, there being provided for this column a selector unit 6| on the carriage, said unit having tooth 61 to select the cam plate I00 in which the amount was entered and also having a subtraction tooth 61S i'or determining subtraction of the deduction from said register according to known practice in this type of machine.

The "Net amount" typed in the fourth column of the work sheet may be read from the right hand register and there maybe provided on the carriage a selector unit such as SI for causing said amount to be indexed and entered in say the middle one of the three registers shown.

it will be understood that during each cycling operation, the computing wheels of the selected register are shifted to mesh and unmesh with the register bar racks such as 43 or with the idlers such as 42 depending, respectively, on addition or subtraction. Each register may be provided with carry-over means (not shown) since said means may he of the kind shown in said Pitman Patent 1,927,951. During the cycling operation the set index pins t5 are caused to be restored as in said Pitman Patent 1,927,951. Each register bar, M, M5 is shown with a ll pin it? that is normally depressed and each register har may have means, as in Patent No. 2,075,557, to 0. Thieme, dated March 30, 1937, whereby the depression of a higher pin d5 restores the olepresseol zero pin 45". Conversely, re-depression of the zero pin 45 restores any depressed higher pin Q5; and therefore, the pin restoring means being operative during the cycle to depress again all the zero pins 45 that had become restored during the pin-setting operation.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

What is claimed is:

l. In a combined typewriting and computing machine having a plurality of registers, the comhination with a set of digit type-keys, a typing carriage controlled by said keys, and a plurality of selectable sets, one set for each register, of indexable computing-wheel drivers of different denominations; of a single denominational series of lacks operable seriatim by said carriage to select the drivers of. a selected set seriatim for digit-indexing operations controlled by said keys, key-locking means normally cooperative with a certain one of said jacks, as the latter is operated by said carriage, to lock said digit type-keys, and means operable at will to disable said keylocking means so as to suppress the key-locking function of said one jack, whereby to cause a certain one of said drivers to be indexed by means of one of said keys, means being provided to cooperate with said one jack to invariably select said one driver for the indexing operation independently of whether or not the keys are locked.

2. The combination with lockable digit-keys, and a step-by-step feeding carriage controlled by said keys, of a set of, indexable computing-wheel drivers of certain denominations as, for instance, decimal denominations, a computing-wheel driver of a different denomination, as, for instance, a fraction denomination, a set of jacks engageable seriatlm by the carriage to select the drivers for indexing them by means of said keys, one of said jacks being adapted to select the computingwheel driver of said difierent denomination, means normally cooperative with said one jack 'when the latter is engaged by said carriage, to

lock said digit-keys, whereby to prevent the indexing of said computing-wheel driver 01 dif- 'diflerent function, and a connector-device controlled by said case shiftmechanlsm to enable, normally,, said first jack, when operated by said carriage, to operate said secondary jack, said connector-device being responsive to operation of said case-shift mechanism to eifect disconnection of said secondary jack from saidfirst jack, whereby to suppress said different function.

4. In a combined typewriting and computing machine, the combination of a series of type keys controlling upper and lower case amount-printing types, a step by step feeding carriage cooperative with said types, a case-shift mechanism associated with said types, computing mechanism, including an indexable computing wheel driver and a jack operable by the carriage at a certain place in a computing zone of the carriage travel to render said driver indexable, said place representing a punctuation-space relative to the amounts printable at a zone by the lower case types and also representing a computing-denomination at which said driver is indexable relative to the amounts printable at a zone, by the upper case types, and a key locking'mechanism controlled by said jack and the case shift mechanism so as to be operated by said jack to lock said keys at said place when typing an amount with the lower case types and so as to be inoperable by said jack at said place when typing an amount with said upper case types and indexing said driver.

5. Machine constructed according to claim 4, said case-shift mechanism including two case shift keys, and said machine including means responsive only to operation of one of said case shift keys, and not to operation of the other case shift key, to render said jack inoperable by the carriage when typing in upper case, said other case shift key being operable preparatory to typing the amount with the upper case types and concomitantly having said jack operable by said carriage.

6. In a combined typewriting and computing machine, in combination; typewriter mechanism including upper and lower case amount-printing types, keys for actuating said types, a letterfeeding carriage cooperative with said types, and a case-shift mechanism; a plural-register computing mechanism including a plurality of selectable sets, one set for each register, of computing wheel drivers, a series of jacks and sets of connections ramifying therefrom to the sets of drivers, a jack representing a punctuation-space position of the carriage relative to one of the registers, said latter jack having a connection to one of the drivers for the other register, computing zone tappets on the carriage for actuating said jacks to select the drivers of a pre-selected set seriatim forindexing by means of said keys;

. key-locking means, and means dependent on therefrom to cause said latter jack to lock said keys or to leave said keys unlocked when the carriage is at said position, said connection of said one driver to said Jack being effective when said keys are unlocked 7. In a combined typewriting and computing machine, in combination, typing keys, amountprinting types controlled by said keys, a letterfeed carriage cooperative with said types, a plurality of sets of computing-wheel drivers, said sets being selectable for indexing operations by said keys, a series of jacks operable by the carriage and adapted to select the drivers of a selected set for the indexing operations, one of said Jacks constituting a punctuation-jack, but not a driver-selecting jack, relative to one of the sets of drivers and also constituting a driverselecting Jack relative to the other set of drivers, key-locking means normally actuatable by said one jack, and when the latter acts as a punctuation jack, to lock said keys, and means operable, preparatory to use of one of said types by means of its key at the carriage position whereat said one jack is operated, to render said key-locking means inoperable by said one jack.

8. In a combined typewriting and computing machine, in combination, typing-keys control-' ling upper and lower case types, a typing car- I riage, a case-shiftable part, a jack operable by the carriage to select acertain computing-mechanism element, a key locking mechanism, a secondary jack operable by means of said first jack to actuate said key locking mechanism, and a connector-device controlled by said case-shiftable part to determine connection or disconnection of said Jacks.

9. In a combined typewriting and computing machine, in combination, type-keys controlling types for printing, for instance, a dollars-andcents amount in which the cents are set off from the dollars by a punctuation space, a step-bystep feeding carriage, cooperative with said types and operable to step into and out of the punctuation-space position, type-key locking mechanism, a jack operable by the carriage at such position relative to different computing zones of the carriage travel, connections from said jack to select a certain indexable computing mechanism element and to also actuate said key locking mechanism, one or another said types being operable also at the jack operating position of the carriage, as for printing, and indexing in said element, a last figure, for instance, a fraction, of different order than such first amount, and means operable at will, preparatory to printing and indexing such last figure, to suppress operation of the key locking mechanism by said jack.

10. In a combined typewriting and computing machine, in combination, digit type keys, a letter feed carriage cooperative with said keys, a set of jacks including carriage-operated computing-wheel-driver-selecting jacks and also including two jacks corresponding to punctuation space positions of the carriage relative to said driver-selecting jacks, a key locking mechanism operable by means of one of said two jacks, the other of said two jacks being adapted to serve as a computing-wheel-driver-selecting jack, and

a diiferentially condltionable connection normally conditioned to enable said latter jack to operate said key locking mechanism, saidconnection being condltionable to disconnect the key locking mechanism from said latter jack.

11. In a machine of the character described,

the combination with lockable digit-keys, and a step-by-step feeding carriage controlled by said keys, of a jack operated by the carriage at a certain position thereof to eifect a certain function concomitantly with operation of said keys,

key-locking m'eans, a differentially conditionable connector-device normally conditioned to enable said jack to operate said key-locking means whereby, ordinarily, to prevent operation of any key at said position, and means operable to condition and thereby disable said connector-device to disable said key-locking means preparatory to using any one of said digit-keys at said position, said latter means being inoperative to disable said function of said jack.

12. In a machine of the character described, the combination with lockable digit-keys, and a step-by-step feeding carriage controlled .by said keys, of a jack operated by the carriage at a certain position thereof to effect a certain function concomitantly with operation of a certain part of said keys, means operable to lock simultaneously all of said keys, a differentially conditionable connector-device normally conditioned to enable said jack to operate the all-keys-locking-means whereby, ordinarily, to prevent operation of any key at said position, means operable to condition and thereby disable said connectordevice to disable said all-keys-locking means preparatory to using said certain part of said keys and effecting said function at said position, and

an auxiliary locking-device responsive to said jack at said position to lock the remaining-part of said keys.

13. In a combined typewriting and computing machine, in combination, typing-keys controlling upper and lower case types, a typing carriage,

'a case-shiftable part, a computing wheel driver selectable for an indexing operation by means of said keys, a jack operable by the carriage to select said driver, a key locking mechanism, and a connector-device controlled by said case-shiftable part to determine connection or disconnection of said jack and key locking mechanism, said Jack being eifective to select said driver when said jack and key locking mechanism are disconnected.

14. In a combined typewriting and computing machine, in combination, type keys, upper and lower case types controlled by said keys, 9. letter feed carriage cooperative with said types, a case shift mechanism, said typesbeing operable in lower case to print, for instance, a dollarsand-cents amount in which the cents are set ofi from the dollars by a punctuation space, the upper case types being operable to print an amount flgure at a carriage position corresponding to said punctuation space, a jack operable by the carriage to select a computing element to be indexed for said upper case amount figure, said jack serving also as a punctuation space jack operable by the carriage relative to the lower case typing, and a key locking mechanism operatively connected to said jack and controlled by said case shift mechanism to enable said one jack, when operated by the carriage, to lock said keys when the lower case types are being actuated and to render said keys unlocked without afiecting the computing-element-selecting function of said jack when said case shift mechanism is actuated for upper case typing.

15. In a machine of the character described having key operated indexers, a carriage feeding step by step at operation of said indexers, and two registers,'each including a set of computing wheels and indexable drivers therefor movable individually into index-receiving position relatively to said indexers, one register being adapted for computing amounts in one order of denominations and the other register being adapted for computing amounts in a different order of denominations: driver selecting mechanism, controlled by said carriage, comprising a single row of driver-moving Jacks encompassing both orders of denominations, some of said jacks being common to both registers, two members, one for each set of drivers, selectively displaceable by the carriage at a computing zone, one member having connections eflective at displace- ,ment of said member to operatively connect its drivers to one order of said Jacks and the other member having connections effective at displacement of said other member to operatively con nect its drivers to the other order of jacks, said carriage including. tappet means to displace one or the other of said members at a computing zone, and said carriage also including tappet means arranged relatively to said Jacks to actuate the appropriate order of jacks at said zone.

WALTER T. SAGNER.

CERTIFICATE OF CORRECTION. Patent No. 2,1a6, h7. January 9, who.

WALTER T. SAGNER..

Itis hereby certified that errer appears in the printed specification of the above numberedpatent requiring correction as follows: Page 10, first column, line 7, claim. 5, for "comhbination" read combination; and second" column, line 20, claim '7, for "and when'f read as when; and that the said Letters Patent should be reagi with this correction therein that the same may conform to the fe'cord of the case in the Patent Office.

Sig ned and sealed this 15th day of February; 1. D. 191p.

Henry Van Arsdale,

(Seal) Acting Commissioner of Patents.

I CERTIFICATE OF CORRECTION.

Batent Ne. 2,186,347. January 9, 191 0.

WALTER 1'. SAGNER. It. is hereby certified that errer appears in the printed specification of the abev'e numbered patent requiring .correction a s foilows: Page 10, first c'olumn, 1 1 ne 7 claim 3, for "eomhbination" read. combinatioh; and second eolumnfline 20, c1a1m '7, for "and when" read as when; and that the said Letters Patent should be reeg wi th this correction therein that the same may eonforni to the fecord of the ci'se in the Patent Office.

sighed and sealed this lfithday QfFeQruery; .A. D. 191p.

Henry Van Arsdale,

(860.1.) Acting Conmtaaioneiof Patents. 

